The Bi2O3 doped Ba0.85Ca0.15(Zr0.1Ti0.88Mn0.02) O3 piezoelectric ceramics were prepared by solid state method, the microstructure of the system and the effect of Bi2O3 doping amount on the piezoelectric properties of the system were studied. The sample with the best performance of the system was assembled into a micro air pump and compared its performance with the MZB1001T02 micro air pump from Murata, Japan. The results show that the lead-free piezoelectric ceramics of Bi2O3 doped Ba0.85Ca0.15(Zr0.1Ti0.88Mn0.02) O3 exhibit a single perovskite structure, and a small amount of Bi2O3 doping makes the system keep the coexistence of trigonal phases and tetragonal phases. When the doping amount is 0.05 wt%, the distribution of grains is uniform and the dielectric and piezoelectric properties of the samples are the best, i. e.εT33=5 289,kp=0.46,d33=377 pC/N,tan δ=0.72%、Tc=80 ℃,and the sample exhibits typical dielectric relaxation characteristics. The above sample was assembled into the micro air pump, and under the conditions of input frequency of (25±2) kHz，input voltage of 15 V, the measured air pressure of the micro air pump was slightly lower than that of the micro-pump of Murata , Japan. The sample can be applied to some areas of low pressure requirements.